Several students witnessed the late-morning shooting, but no one else was injured.

“I turned around and I saw the girl was shot,” student Joe Fazio said. “It looks like she was shot in the back of the neck. Then I heard the second gunshot. I turned around and the guy was laying on the ground.”

It was the third shooting at schools nationwide in the past week.

On Wednesday, the dean, a professor and a student were shot and killed at Appalachian School of Law in Grundy, Virginia. A student who had recently flunked out was arrested.

Two students were shot and wounded Tuesday at Martin Luther King Jr. High School in New York City. A teen-ager was arrested Friday.